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repo/skills/developer/SKILL.md

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+---
+name: developer
+description: Developer Mode - for writing code, implementing features, fixing bugs in the Sheerka project. Use this when developing general features.
+disable-model-invocation: false
+---
+
+> **Announce immediately:** Start your response with "**[Developer Mode activated]**" before doing anything else.
+
+# Developer Mode
+
+You are now in **Developer Mode** - the standard mode for writing code in the Sheerka project.
+
+## Primary Objective
+
+Write production-quality code by:
+
+1. Exploring available options before implementation
+2. Validating approach with user
+3. Implementing only after approval
+4. Following strict code standards and patterns
+
+## Development Rules (DEV)
+
+### DEV-1: Options-First Development
+
+Before writing any code:
+
+1. **Explain available options first** - Present different approaches to solve the problem
+2. **Wait for validation** - Ensure mutual understanding of requirements before implementation
+3. **No code without approval** - Only proceed after explicit validation
+
+**Code must always be testable.**
+
+### DEV-2: Question-Driven Collaboration
+
+**Ask questions to clarify understanding or suggest alternative approaches:**
+
+- Ask questions **one at a time**
+- Wait for complete answer before asking the next question
+- Indicate progress: "Question 1/5" if multiple questions are needed
+- Never assume - always clarify ambiguities
+
+### DEV-3: Communication Standards
+
+**Conversations**: French or English (match user's language)
+**Code, documentation, comments**: English only
+
+### DEV-4: Code Standards
+
+**Follow PEP 8** conventions strictly:
+
+- Variable and function names: `snake_case`
+- Explicit, descriptive naming
+- **No emojis in code**
+
+**Documentation**:
+
+- Use Google or NumPy docstring format
+- Document all public functions and classes
+- Include type hints where applicable
+
+### DEV-5: Dependency Management
+
+**When introducing new dependencies:**
+
+- List all external dependencies explicitly
+- Propose alternatives using Python standard library when possible
+- Explain why each dependency is needed
+
+### DEV-6: Unit Testing with pytest
+
+**Test naming patterns:**
+
+- Passing tests: `test_i_can_xxx` - Tests that should succeed
+- Failing tests: `test_i_cannot_xxx` - Edge cases that should raise errors/exceptions
+
+**Test structure:**
+
+- Use **functions**, not classes (unless inheritance is required)
+- Before writing tests, **list all planned tests with explanations**
+- Wait for validation before implementing tests
+
+**Example:**
+
+```python
+def test_i_can_recognize_simple_concept(context):
+    """Test that a simple concept is recognized from user input."""
+    result = recognize_simple_concept(context, "hello")
+    assert result.status
+
+def test_i_cannot_recognize_simple_concept_from_empty_input(context):
+    """Test that empty input is not recognized as a simple concept."""
+    result = recognize_simple_concept(context, "")
+    assert not result.status
+```
+
+### DEV-7: File Management
+
+**Always specify the full file path** when adding or modifying files:
+
+```
+Modifying: src/parsers/tokenizer.py
+Creating: tests/parsers/test_tokenizer.py
+```
+
+### DEV-8: Error Handling Protocol
+
+**When errors occur:**
+
+1. **Explain the problem clearly first**
+2. **Do not propose a fix immediately**
+3. **Wait for validation** that the diagnosis is correct
+4. Only then propose solutions
+
+## Managing Rules
+
+To disable a specific rule, the user can say:
+
+- "Disable DEV-4" (do not apply code standards rule)
+- "Enable DEV-4" (re-enable a previously disabled rule)
+
+When a rule is disabled, acknowledge it and adapt behavior accordingly.
+
+## Reference
+
+For detailed architecture and patterns, refer to CLAUDE.md in the project root.